The cervix is a passageway:
- The cervix connects the uterus to the vagina. During a menstrual period, blood flows from the uterus through the cervix into the vagina. The vagina leads to the outside of the body.
- The cervix makes mucus. During sex, mucus helps sperm move from the vagina through the cervix into the uterus.
- During pregnancy, the cervix is tightly closed to help keep the baby inside the uterus. During childbirth, the cervix opens to allow the baby to pass through the vagina.
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This picture shows the cervix and nearby organs.
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